.add-words {
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 768px) {
  .add-words {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

.add-words h2 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: #2c3e50;
  font-size: 2rem;
}

.description {
  margin-bottom: 1.5rem;
  color: #666;
  font-size: 0.95rem;
}

.markdown-input {
  width: 100%;
  padding: 1rem;
  border: 2px solid #ddd;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
  resize: vertical;
  margin-bottom: 1rem;
  transition: border-color 0.2s;
}

.markdown-input:focus {
  outline: none;
  border-color: #3498db;
}

.tabs-container {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid #e0e0e0;
}

.tab-button {
  background: none;
  border: none;
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  color: #666;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}

.tab-button:hover {
  color: #3498db;
}

.tab-button.active {
  color: #3498db;
  border-bottom-color: #3498db;
  font-weight: 600;
}

.tab-content {
  margin-bottom: 1rem;
}

.word-pairs-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.word-pair-item {
  display: flex;
  flex-direction: row;
  gap: 0.75rem;
  width: 100%;
  box-sizing: border-box;
}

.word-input,
.translation-input {
  flex: 1;
  min-width: 0;
  padding: 0.75rem;
  border: 2px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.word-input:focus,
.translation-input:focus {
  outline: none;
  border-color: #3498db;
}

.remove-pair-button {
  background: transparent;
  border: none;
  border-radius: 6px;
  color: #9ca3af;
  cursor: pointer;
  width: 2rem;
  min-width: 2rem;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  box-sizing: border-box;
  flex-shrink: 0;
  align-self: stretch;
}

.remove-pair-button svg {
  display: block;
  margin: 0;
  vertical-align: middle;
}

.remove-pair-button:hover {
  background-color: rgba(239, 68, 68, 0.1);
  color: #ef4444;
}

.remove-pair-button:active {
  background-color: rgba(239, 68, 68, 0.2);
  transform: scale(0.95);
}

.add-pair-button {
  width: 100%;
  padding: 0.75rem;
  background-color: #f8f9fa;
  border: 2px dashed #ddd;
  border-radius: 4px;
  font-size: 1.5rem;
  line-height: 1;
  color: #666;
  cursor: pointer;
  transition: background-color 0.2s, border-color 0.2s, color 0.2s;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
  min-height: calc(0.75rem * 2 + 1rem + 4px);
}

.add-pair-button:hover {
  background-color: #e9ecef;
  border-color: #3498db;
  color: #3498db;
}

.submit-button {
  width: 100%;
  background-color: #3498db;
  color: white;
  border: none;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background-color 0.2s;
  margin-bottom: 1rem;
}

.submit-button:hover:not(:disabled) {
  background-color: #2980b9;
}

.submit-button:disabled {
  background-color: #bdc3c7;
  cursor: not-allowed;
}

.message {
  margin-top: 1rem;
  padding: 1rem;
  border-radius: 4px;
  font-weight: 500;
}

.message.success {
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.message.error {
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

.close-x-button {
  position: fixed;
  top: 1rem;
  right: 1rem;
  background: rgba(255, 255, 255, 0.9);
  border: none;
  font-size: 1.5rem;
  color: #7f8c8d;
  cursor: pointer;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: background-color 0.2s, color 0.2s;
  z-index: 1600;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.close-x-button:hover {
  background-color: #ffffff;
  color: #2c3e50;
}